Enable setting FT4232 ports as GPIO

Enable setting FT4232 ports as GPIO.
Aside from port B that is used for I2C communication, port C
or port D might be used as GPIOs. This is true for S32N79RDB
that has TP32, TP30, TP29 and TP27 connected to Port C and D.

Signed-off-by: Costin Constantin <costin.constantin@nxp.com>

Author: costinctin

chip.c

@@ -1054,8 +1054,7 @@ void* ft4232h_gpio_create(char* chip_specification, void* parent)
 int ft4232h_gpio_write(void* ft4232h, unsigned char bit_value)
 {
 	struct ft4232h_gpio* ft = ft4232h;
-	int mask = 0xFF;
-	if (ft_set_bitmode(ft->ftdi_info, mask, BM_BITBANG) < 0)
+	if (ft_set_bitmode(ft->ftdi_info, ft->gpio_device.pin_bitmask, BM_BITBANG) < 0)
 		printf("failed to set bitmode\n");
 
 	unsigned char current_output;

port.c

@@ -178,7 +178,6 @@ int ft_open_channel(struct ftdi_info* fi, int channel)
 
 int ft_close(struct ftdi_info* fi)
 {
-	//ft_set_bitmode(fi, 0, 0); //resetting the controller. This will reset port C/D which is not desired.
 #ifdef _WIN32
 	int num = fi->FT_close(fi->ftdi);
 	//printf("%d\n",num);